Finding an image’s resolution on a Windows PC takes a few seconds and tells you two related things: the pixel dimensions, meaning how many pixels wide and tall the image is, and the DPI value stored in the file. Knowing both matters when you are preparing a photo for print or checking whether a file is large enough for a given use.
Check resolution in File Explorer
The quickest method needs no software. In File Explorer, right-click the image file and choose Properties, then open the Details tab. Scroll to the Image section and you will see Dimensions (for example 6000 x 4000), along with horizontal and vertical resolution shown in DPI. The dimensions are the true measure of how much detail the file holds.
Check it in the Photos app or an editor
Opening the file in the Windows Photos app and viewing its file information also shows the pixel dimensions. Any editor, such as Photoshop or the free GIMP, displays the full resolution and lets you change the print size and DPI under an image-size dialog. This is where you would resize an image or set its print dimensions.
Pixel dimensions versus DPI
It helps to understand what these numbers mean. The pixel dimensions are fixed and define the actual detail captured. DPI, or dots per inch, is just an instruction for how large those pixels print, so a 6000 x 4000 file prints sharply at 20 by 13 inches at 300 DPI, or larger at a lower DPI. Changing the DPI number alone does not add or remove detail; only the pixel count does that.
Common mistakes to avoid
- Confusing DPI with actual resolution. The pixel dimensions, not the DPI tag, determine image detail.
- Trying to make a small image larger by raising its DPI, which adds no real detail.
- Judging print size from DPI alone instead of from the pixel dimensions and viewing distance.
Frequently asked questions
How do I check image resolution on Windows?
Right-click the file, choose Properties, open the Details tab, and read the Dimensions and resolution under the Image section. Any photo editor shows the same information.
What is the difference between resolution and DPI?
Resolution in pixels is the actual detail in the file and is fixed. DPI is only an instruction for print size; changing it does not change the detail.
What resolution do I need to print?
Aim for about 300 DPI at your intended print size. A 24-megapixel file (6000 x 4000) prints sharply up to roughly 20 by 13 inches.